CN105108128B - A kind of continuous casting tundish energy-conservation baking system and its use technique - Google Patents
A kind of continuous casting tundish energy-conservation baking system and its use technique Download PDFInfo
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- CN105108128B CN105108128B CN201510650473.0A CN201510650473A CN105108128B CN 105108128 B CN105108128 B CN 105108128B CN 201510650473 A CN201510650473 A CN 201510650473A CN 105108128 B CN105108128 B CN 105108128B
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Abstract
The invention discloses a kind of continuous casting tundish energy-conservation baking system and its using technique, air pipe line Jing air control valves lead in oxygen-enriched blending tank；Oxygen pipeline Jing oxygen regulating valves are also led in oxygen-enriched blending tank；The outlet pipe Jing air-introduced machines of oxygen-enriched blending tank lead to tundish inner chamber；Gaspipe line Jing gas regulators also lead to tundish inner chamber；The smoke pipeline of tundish leads to smoke-exhaust pipeline by smoke regulating valve Jing heat exchangers；The heat exchange air inlet lines Jing air inlet adjustment valves of heat exchanger, hot-air outlet pipe Jing outlet regulating valve are connected on the forward and backward pipeline of air inlet of air control valve.Have the advantage that：1st, baking of tundish effect and baking speed are drastically increased.2nd, by using heat exchanger, the flue gas heat discharged after baking of tundish is recycled utilization, for preheated air.Reduce energy cost.3rd, using the oxygen-rich mixture baking tundish from the mixing of oxygen-enriched blending tank, flame temperature is higher, and cured effect is more preferably.
Description
First, technical field
The invention belongs to baking of tundish technical field, and in particular to a kind of continuous casting with tundish energy-conservation baking system and its
Using technique.
2nd, background technology
Tundish is the refractory material containers used in steel-making continuous casting, and molten steel is assigned to each crystallization by the mouth of a river
In device, it is important functional refractory in continuous casting, as bakie working lining is that refractory material perfusion is formed, so after molding
Needs are toasted, and remove moisture removal, improve dry materials hardness, if preheating time is long, the resistance to material oxidation of cylinder-packing is serious, affects middle
Bag service life, gas consumption high cost, low production efficiency.
At present the conventional roasting mode of tundish be by air and coal gas mixing preheating means, will air and coal gas lead to
Cross pipeline and each lead into tundish inner chamber, ignition is toasted to tundish.This kind of mode is due to toasting tundish burning
The flame temperature of fire is relatively low, causes baking time up to 15-20 hours, and tundish is long in low-temperature space baking time, does not reach quick
Temperature raising effect, then have the flue gas heat that baking process is produced to be not used, energy cost is high, reduces production efficiency.
3rd, the content of the invention
It is an object of the invention to provide a kind of continuous casting tundish energy-conservation baking system and its technique is used, it is existing to overcome
The weak point of roasting mode.
For achieving the above object, the technical solution used in the present invention is：
First, continuous casting tundish energy-conservation baking system, the system include the air pipe line with combustion fan, oxygen hose
Road, gaspipe line, oxygen-enriched blending tank, tundish and heat exchanger, are characterized in：Air pipe line Jing air control valves lead to oxygen-enriched mixed
Close in tank；Oxygen pipeline Jing oxygen regulating valves are also led in oxygen-enriched blending tank；The outlet pipe Jing air-introduced machines of oxygen-enriched blending tank lead to
To tundish inner chamber；Gaspipe line Jing gas regulators also lead to tundish inner chamber；The smoke pipeline of tundish is adjusted by flue gas
Section valve Jing heat exchangers lead to smoke-exhaust pipeline；The heat exchange air inlet lines Jing air inlet adjustment valves of heat exchanger, hot-air outlet pipe Jing go out controlled atmosphere
Section valve is connected on the forward and backward pipeline of air inlet of air control valve.
2nd, use technique of the continuous casting with tundish energy-conservation baking system, the technique comprise the steps：
1st, start combustion fan, air control valve is adjusted to 50% aperture, restart air-introduced machine, introduce air into tundish,
Gas regulator is opened to 50% aperture, draws ignition baking tundish after coal gas is mixed with air, small fire baking tundish
150 minutes, while open smoke regulating valve exchanging heat to 80% aperture, air inlet adjustment valve and outlet regulating valve to the operation of 60% aperture
Device, heat exchange air are discharged into and out of pipe preheated air, waste gas from smoke-exhaust pipeline；
2nd, air control valve and gas regulator are adjusted to 60% aperture, moderate heat is carried out and is toasted 90 minutes；
3rd, when the temperature in tundish reaches 700 DEG C, adjust air control valve and oxygen regulating valve enters to 50-60% apertures
The oxygen-enriched baking of row big fire：Air control valve and oxygen regulating valve aperture are adjusted first, make oxygen quality fraction in oxygen-enriched blending tank
Reach 35% baking 60 minutes；When tundish temperature is more than 900 degree, oxygen regulating valve is adjusted to 40-50% apertures, make oxygen-enriched mixing
Oxygen quality fraction in tank is toasted 60 minutes 30%；Open before pouring, then adjust air control valve and oxygen regulating valve aperture, make
Oxygen quality fraction in oxygen-enriched blender reaches 35% baking 60 minutes.
The present invention adopts said system and technique, has the advantage that：
1st, baking of tundish effect and baking speed are drastically increased, is adjusted by large and small fire and is used oxygen-enriched mixing
The baking of tundish resistance to material only can be finished with 6 hours, reach baking standard by gas, and relatively original list uses air and gas-fired
The time of baking saves 9 hours, shortens baking time, greatly improves baking efficiency.
2nd, by using heat exchanger, the flue gas heat discharged after baking of tundish is recycled utilization, for preheated air,
Can make which 20-30 DEG C be improved from room temperature, reduce coal gas usage amount during tundish mixture combustion, reduce energy cost.
3rd, using the oxygen-rich mixture baking tundish from the mixing of oxygen-enriched blending tank, flame temperature is higher, and cured effect is more
Good, bakie working lining dry materials hardening strength is higher, eliminates crack and delamination, and tundish work life is improved.
4th, illustrate
Structural representations of the Fig. 1 for present system.
5th, specific embodiment
As illustrated, continuous casting tundish energy-conservation baking system of the present invention include the air pipe line 5 with combustion fan 1,
Oxygen pipeline 9, gaspipe line 19, oxygen-enriched blending tank 6, tundish 12,18 and heat exchanger 14.5 Jing air control valves 2 of air pipe line
Lead in oxygen-enriched blending tank 6.9 Jing oxygen regulating valves 4 of oxygen pipeline are also led in oxygen-enriched blending tank 6.The outlet of oxygen-enriched blending tank 6
Lead to one 12 inner chamber of tundish on pipeline Jing air-introduced machines 7 one tunnel, and the adjusted valve in another road 10 leads to 2 18 inner chamber of tundish.Gas pipe
Lead to 2 18 inner chamber of tundish on 19 Jing gas regulators of road, 8 one tunnel, and the adjusted valve in another road 11 leads to one 12 inner chamber of tundish.In
Between the smoke pipeline 20 of bag one, 2 12,18 lead to smoke-exhaust pipeline 17 by converging Jing heat exchangers 14 after smoke regulating valve 13 respectively.
The 22 Jing air inlet adjustments valve 15 of heat exchange air inlet lines of heat exchanger 14,21 Jing outlets regulating valve 16 of hot-air outlet pipe are connected to sky
On the forward and backward pipeline of air inlet of gas regulating valve 2.During baking tundish, can pass through regulating valve 10,11 and smoke regulating valve 13 is carried out
Select to toast one or two tundish.Divide on the rear pipeline of above-mentioned air control valve 2, oxygen regulating valve 4 and gas regulator 8
Stop valve 3-1,3-2, the 3-3 adopted when not being provided with emergent.
The use technique of the continuous casting tundish energy-conservation baking system comprises the steps：
1st, start combustion fan 1,2 valve of air adjustment is adjusted to 50% aperture, open the apertures of stop valve 3-1 to 100%, then open
Dynamic air-introduced machine 7, introduces air into tundish, opens 8 to 50% aperture of gas regulator, opens the apertures of stop valve 3-3 to 100%,
Draw ignition baking tundish after coal gas is mixed with air, small fire baking tundish 150 minutes, the length of flame of small fire is
200-250mm, while opening 13 to 80% aperture of smoke regulating valve, adjusts air inlet adjustment valve 15 and outlet regulating valve 16 is opened to 60%
Degree operation heat exchanger 14, heat exchange air into and out of pipe 22,21 preheated airs, discharge from smoke-exhaust pipeline 17 by waste gas；
2nd, 8 to 60% aperture of air control valve 2 and gas regulator is adjusted, carries out moderate heat and toast 90 minutes, the flame of moderate heat
Length is 250-300mm；
3rd, when the temperature in tundish reaches 700 DEG C, air control valve 2 and oxygen regulating valve 4 are adjusted to 50-60% apertures,
The apertures of stop valve 3-2 to 100% are opened, the oxygen-enriched baking of big fire is carried out, the length of flame of big fire is 300-350mm：Adjust first empty
4 aperture of gas regulating valve 2 and oxygen regulating valve, makes oxygen quality fraction in oxygen-enriched blending tank 6 reach 35% baking 60 minutes；It is central
Between bag temperature more than 900 degree, adjust oxygen regulating valve 4 to 40-50% apertures, reach the oxygen quality fraction in oxygen-enriched blending tank 6
To 30% baking 60 minutes；Open before pouring, then by adjusting 4 aperture of air control valve 2 and oxygen regulating valve, make in oxygen-enriched blender 6
Oxygen quality fraction reach 35% baking 60 minutes.
Claims (2)
1. use technique of a kind of continuous casting with tundish energy-conservation baking system, the technique comprise the steps：
1. start combustion fan（1）, adjust air control valve（2）To 50% aperture, restart air-introduced machine（7）, in introducing air into
Between wrap, open gas regulator（8）To 50% aperture, draw ignition baking tundish after coal gas is mixed with air, small fire baking
Tundish 150 minutes, while opening smoke regulating valve（13）To 80% aperture, air inlet adjustment valve（15）And outlet regulating valve（16）
Heat exchanger is run to 60% aperture（14）, heat exchange air is into and out of pipe（22、21）Preheated air, waste gas is from smoke-exhaust pipeline（17）Row
Go out；
2. adjust air control valve（2）And gas regulator（8）To 60% aperture, carry out moderate heat and toast 90 minutes；
3. when the temperature in tundish reaches 700 DEG C, adjust air control valve（2）And oxygen regulating valve（4）To 50-60% apertures
Carry out the oxygen-enriched baking of big fire：Air control valve is adjusted first（2）And oxygen regulating valve（4）Aperture, makes oxygen-enriched blending tank（6）Interior oxygen
Gas mass fraction reaches 35% baking 60 minutes；When tundish temperature is more than 900 degree, oxygen regulating valve is adjusted（4）Open to 40-50%
Degree, makes oxygen-enriched blending tank（6）Interior oxygen quality fraction is toasted 60 minutes 30%；Open before pouring, then adjust air control valve（2）
And oxygen regulating valve（4）Aperture, makes oxygen-enriched blending tank（6）Interior oxygen quality fraction reaches 35% baking 60 minutes.
2. a kind of continuous casting according to claim 1 use technique of tundish energy-conservation baking system, is characterized in that：Small fire
The length of flame be 200-250mm；The length of flame of moderate heat is 250-300mm；The length of flame of big fire is 300-350mm.
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| CN201510650473.0A CN105108128B (en) | 2015-10-10 | 2015-10-10 | A kind of continuous casting tundish energy-conservation baking system and its use technique |
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| CN105108128B true CN105108128B (en) | 2017-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106363161B (en) * | 2016-11-21 | 2018-05-15 | 大连新瑞晨环保科技有限公司 | Efficient ladle baking facilities |
| CN108436068B (en) * | 2018-02-08 | 2020-01-10 | 王研 | Efficient intelligent bag baking device and using method thereof |
| CN115255305A (en) * | 2022-08-23 | 2022-11-01 | 山东莱钢永锋钢铁有限公司 | Method for baking tundish of continuous casting machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6384748A (en) * | 1986-09-26 | 1988-04-15 | Nkk Corp | Drying apparatus for tundish |
| CN2465841Y (en) * | 2001-02-26 | 2001-12-19 | 苏州工业园区嘉德环境与能源工程有限公司 | Heat-storage steel ladle baking device |
| CN1613583A (en) * | 1999-08-27 | 2005-05-11 | 杰富意钢铁株式会社 | Heating method of ladle |
| CN201346618Y (en) * | 2009-01-15 | 2009-11-18 | 莱芜钢铁股份有限公司 | Mixed tundish nozzle baking device |
| CN203972839U (en) * | 2014-03-31 | 2014-12-03 | 莱芜钢铁集团有限公司 | The online oxygen enrichment flash baking device of continuous casting tundish |
-
2015
- 2015-10-10 CN CN201510650473.0A patent/CN105108128B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6384748A (en) * | 1986-09-26 | 1988-04-15 | Nkk Corp | Drying apparatus for tundish |
| CN1613583A (en) * | 1999-08-27 | 2005-05-11 | 杰富意钢铁株式会社 | Heating method of ladle |
| CN2465841Y (en) * | 2001-02-26 | 2001-12-19 | 苏州工业园区嘉德环境与能源工程有限公司 | Heat-storage steel ladle baking device |
| CN201346618Y (en) * | 2009-01-15 | 2009-11-18 | 莱芜钢铁股份有限公司 | Mixed tundish nozzle baking device |
| CN203972839U (en) * | 2014-03-31 | 2014-12-03 | 莱芜钢铁集团有限公司 | The online oxygen enrichment flash baking device of continuous casting tundish |
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